Inter Conversion of States of Matter

Q.

Define sublimation

Q.

Give examples of sublimation.

Q.

How does a liquid change into a solid on cooling?

Q.

Name one property which is shown by naphthalene and not by sodium chloride?

Q.

___ is the process by which a gas changes into solid.

1. Evaporation

2. Deposition

3. Condensation

4. Melting

Q.

The picture below depicts the change in phase between two states of matter. Identify the process 'X', by which a gas is converted into its liquid state.

1. Condensation

2. Sublimation

3. Freezing

4. Evaporation

Q.

Question 4:

Define the following terms:

(i) Boiling point

(ii) Melting point

Q.

Explain how sublimation helps in separating components of a mixture.

Q.

In the given figure below, the appropriate terms A, B and C respectively are:

1. A - Freezing , B - Vaporization, C - Deposition

2. A - Vaporization, B - Solidification, C - Sublimation

3. A - Sublimation, B - Solidification, C - Vaporization

4. A - Diffusion, B - Sublimation, C - Vaporization

Q.

Name the state of matter that changes to gaseous state on heating.

Q.

States of matter can be changed by increasing or decreasing the volume.

1. True
2. False

Q.

Ice gets converted into liquid water by:

1. Heat is absorbed.

2. Heat is released.

3. Temperature increases.

4. Temperature decreases.

Q.

What is the physical state of water at $0°\mathrm{C}$?

Q.

What is the physical state of water at 100°C?

Q.

Question 4:

Define the following terms:

(i) Boiling point

(ii) Melting point

Q.

What is meant by sublimation?

Q.

Change in which of the following physical properties can transform matter from one state to another?

1. Temperature

2. Concentration

3. Pressure

4. Volume

Q.

Which of the following phenomenon can transform matter from one state to another?

1. Change in temperature

2. Change in concentration

3. Change in pressure

4. Both, change in pressure and concentration

Q. _____ is the process of conversion of solids directly into the gases.

1. Sublimation
2. Condensation
3. Boiling
4. Evaporation

Q.

The state of water changes from liquid to vapour on heating at ${100}^{\circ }C$. This process is known as

1. Heat is absorbed.

2. Heat is released.

3. Temperature increases.

4. Temperature decreases.

Q.

What happens to the energy level of molecules in water on boiling?

Q.

What is sublimation

Q.

What is vapourization?